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1 #include <iostream>
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2 #include <SDL.h>
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3 #include <SDL_opengl.h>
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4 #include <SDL_image.h>
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5 #include "polygon.h"
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6 #include "xml.h"
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7 #include "sys.h"
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8 #include "triangle.h"
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9 #include "vertex.h"
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10 #include "Span.h"
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11 #include "SpanC.h"
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12 #include "scene_graph_pack.h"
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13 #include "error.h"
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14 #include "viewer_types.h"
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15 using namespace std;
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16
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17 //extern int decode(char *cont, char *file_name);
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18 extern int decode(char *cont, FILE *outfile);
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19
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20
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21 SDL_Surface* Polygon::texture_image;
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22
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23 Polygon::Polygon(void)
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24 {
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25 xyz[0] = 0;
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26 xyz[1] = 0;
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27 xyz[2] = 0;
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28 xyz[3] = 1;
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29 c_xyz[0] = 0;
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30 c_xyz[1] = 0;
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31 c_xyz[2] = 0;
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32 c_xyz[3] = 1;
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33 angle[0] = 0;
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34 angle[1] = 0;
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35 angle[2] = 0;
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36 angle[3] = 1;
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37
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38 for (int i = 0; i < 16; i++) {
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39 matrix[i] = 0;
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40 }
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41 }
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42
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43 void
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44 Polygon::position_init(void)
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45 {
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46 xyz[0] = 0;
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47 xyz[1] = 0;
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48 xyz[2] = 0;
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49 xyz[3] = 1;
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50 c_xyz[0] = 0;
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51 c_xyz[1] = 0;
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52 c_xyz[2] = 0;
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53 c_xyz[3] = 1;
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54 angle[0] = 0;
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55 angle[1] = 0;
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56 angle[2] = 0;
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57 angle[3] = 1;
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58
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59 for (int i = 0; i < 16; i++) {
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60 matrix[i] = 0;
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61 }
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62 }
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63
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64 #if 0
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65 void Polygon::draw(SceneGraphPack *sgp)
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66 {
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67 float xyz1[4],xyz2[4],xyz3[4];
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68
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69 /***SceneGraphUpdate***/
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70 //sgp_update();
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71 for (int i = 0; i < sgp->info.size; i++) {
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72 SceneGraphNode node = sgp->node[i];
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73
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74 /***draw***/
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75 int n,nt;
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76 for(n=0,nt=0; n<node.size*3; n+=9,nt+=6) {
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77 xyz1[0] = node.vertex[n];
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78 xyz1[1] = node.vertex[n+1];
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79 xyz1[2] = node.vertex[n+2]*-1;
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80 xyz1[3] = 1;
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81 xyz2[0] = node.vertex[n+3];
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82 xyz2[1] = node.vertex[n+3+1];
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83 xyz2[2] = node.vertex[n+3+2]*-1;
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84 xyz2[3] = 1;
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85 xyz3[0] = node.vertex[n+6];
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86 xyz3[1] = node.vertex[n+6+1];
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87 xyz3[2] = node.vertex[n+6+2]*-1;
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88 xyz3[3] = 1;
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89
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90 rotate(xyz1, node.translation);
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91 rotate(xyz2, node.translation);
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92 rotate(xyz3, node.translation);
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93
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94 Vertex *ver1 = new Vertex(xyz1[0],xyz1[1],xyz1[2],node.texture[nt],node.texture[nt+1]);
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95 Vertex *ver2 = new Vertex(xyz2[0],xyz2[1],xyz2[2],node.texture[nt+2],node.texture[nt+2+1]);
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96 Vertex *ver3 = new Vertex(xyz3[0],xyz3[1],xyz3[2],node.texture[nt+4],node.texture[nt+4+1]);
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97
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98 Triangle *tri = new Triangle(ver1,ver2,ver3);
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99 Span_c *span = new Span_c();
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100 span->viewer = viewer;
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101 span->p = this;
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102 span->create_span(tri,texture_image);
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103 delete ver1;
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104 delete ver2;
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105 delete ver3;
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106 delete tri;
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107 delete span;
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108 }
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109 }
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110 }
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111
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112
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113 void Polygon::draw(PolygonPack *pp)
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114 {
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115 for(int n=0; n<pp->info.size; n++)
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116 {
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117 Vertex *ver1 = new Vertex(pp->tri[n].ver1.x,pp->tri[n].ver1.y,pp->tri[n].ver1.z,pp->tri[n].ver1.tex_x,pp->tri[n].ver1.tex_y);
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118 Vertex *ver2 = new Vertex(pp->tri[n].ver2.x,pp->tri[n].ver2.y,pp->tri[n].ver2.z,pp->tri[n].ver2.tex_x,pp->tri[n].ver2.tex_y);
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119 Vertex *ver3 = new Vertex(pp->tri[n].ver3.x,pp->tri[n].ver3.y,pp->tri[n].ver3.z,pp->tri[n].ver3.tex_x,pp->tri[n].ver3.tex_y);
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120
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121 Triangle *tri = new Triangle(ver1,ver2,ver3);
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122 Span_c *span = new Span_c();
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123 span->viewer = viewer;
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124 span->p = this;
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125 span->create_span(tri,texture_image);
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126 delete ver1;
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127 delete ver2;
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128 delete ver3;
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129 delete tri;
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130 delete span;
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131 }
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132 }
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133
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134 void Polygon::draw(SpanPack *sp)
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135 {
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136 Span *span;
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137
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138 for (int n = 0; n < sp->info.size; n++) {
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139 span = &sp->span[n];
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140
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141 //int x = span->x;
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142 //int y = span->y;
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143 float z = span->start_z;
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144 int end = span->length_x;
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145 float zpos = span->end_z;
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146 float tex1 = span->tex_x1;
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147 float tex2 = span->tex_x2;
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148 float tey1 = span->tex_y1;
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149 float tey2 = span->tex_y2;
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150 Uint32 rgb;
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151 int tex_xpos;
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152 int tex_ypos;
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153 int tex_zpos;
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154 float tex_x, tex_y, tex_z;
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155
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156 if (end == 1) {
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157 tex_xpos = (int)((span->tex_height-1) * tex1);
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158 tex_ypos = (int)((span->tex_width-1) * tey1);
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159 tex_zpos = (int)z;
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160 rgb = get_rgb(tex_xpos, tex_ypos);
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161 //viewer->write_pixel(x, y, zpos, rgb);
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162 } else {
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163 for (int j = 0; j < end; j++) {
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164 tex_x = tex1*(end-1-j)/(end-1) + tex2*j/(end-1);
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165 tex_y = tey1*(end-1-j)/(end-1) + tey2*j/(end-1);
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166 tex_z = z*(end-1-j)/(end-1) + zpos*j/(end-1);
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167 if (tex_x > 1) tex_x = 1;
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168 if (tex_y > 1) tex_y = 1;
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169 tex_xpos = (int)((span->tex_height-1) * tex_x);
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170 tex_ypos = (int)((span->tex_width-1) * tex_y);
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171 rgb = get_rgb(tex_xpos,tex_ypos);
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172 //viewer->write_pixel(j + x, y, tex_z, rgb);
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173 }
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174 }
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175 }
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176 }
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177
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178 #endif
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179
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180 void Polygon::pickup_coordinate(char *cont)
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181 {
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182 for(int n=0; n<size*3; n+=3)
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183 {
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184 cont = pickup_float(cont, coord_xyz+n);
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185 cont = pickup_float(cont, coord_xyz+n+1);
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186 cont = pickup_float(cont, coord_xyz+n+2);
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187
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188 if (cont == NULL)
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189 {
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190 cout << "Analyzing obj data failed coordinate\n";
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191 }
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192 }
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193 }
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194
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195 void Polygon::pickup_normal(char *cont)
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196 {
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197 for (int n = 0; n<size*3; n += 3)
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198 {
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199 cont = pickup_float(cont, normal+n);
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200 cont = pickup_float(cont, normal+n+1);
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201 cont = pickup_float(cont, normal+n+2);
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202
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203 if (cont == NULL)
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204 {
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205 cout << "Analyzing obj data failed normal\n";
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206 }
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207 }
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208 }
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209
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210 void Polygon::pickup_model(char *cont)
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211 {
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212 cont = pickup_float(cont,c_xyz);
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213 cont = pickup_float(cont,c_xyz+1);
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214 cont = pickup_float(cont,c_xyz+2);
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215
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216 if (cont == NULL)
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217 {
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218 cout << "Analyzing obj data failed model\n";
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219 }
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220 }
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221
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222 void Polygon::pickup_texture(char *cont)
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223 {
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224 for (int n = 0; n < size*3; n += 3)
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225 {
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226 cont = pickup_float(cont, coord_tex+n);
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227 cont = pickup_float(cont, coord_tex+n+1);
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228 coord_tex[n+2] = 1.0;
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229
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230 if (cont == NULL)
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231 {
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232 cout << "Analyzing obj data failed texture\n";
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233 }
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234 }
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235 }
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236
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237 char *get_pixel(int tx, int ty, SDL_Surface *texture_image)
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238 {
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239 return (char*)texture_image->pixels+(texture_image->format->BytesPerPixel*((texture_image->w)*ty+tx));
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240 }
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241
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242 unsigned my_ntohl(unsigned u) {
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243 // rr gg bb 00
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244 // rr
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245 // bb gg rr
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246 //unsigned u1 = ((u&0xff)<<24) +
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247 // ((u&0xff00)<<8) +
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248 // ((u&0xff0000)>>8) +
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249 // ((u&0xff000000)>>24);
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250 unsigned u1;
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251 unsigned b = (u&0xff000000)>>24;
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252 unsigned g = (u&0xff0000)>>16;
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253 unsigned r = (u&0xff00)>>8;
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254 u1 = r + (g<<8) + (b<<16);
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255 //printf("pixel %x->%x\n",u,u1);
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256 return u1;
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257 }
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258
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259 Uint32 Polygon::get_rgb(int tx, int ty)
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260 {
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261 SDL_PixelFormat *fmt;
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262 //Uint32 temp, pixel;
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263 Uint8 red, green, blue;
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264
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265 fmt = texture_image->format;
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266
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267 if (tx<0) tx = 0;
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268 if (texture_image->w-1< tx) tx = texture_image->w-1 ;
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269 if (ty<0) ty = 0;
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270 if (texture_image->h-1< ty) ty = texture_image->h-1 ;
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271
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272
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273
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274 //SDL_LockSurface(texture_image);
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275 char *p = get_pixel(tx,ty,texture_image);
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276 #if 0
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277 pixel = my_ntohl(*(Uint32*)p);
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278 //printf("pixel = %d\n", pixel);
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279 //printf("pixel %x bpp = %d ",p, fmt->BytesPerPixel);
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280 //SDL_UnlockSurface(texture_image);
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281
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282 temp = pixel&fmt->Rmask;
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283 temp = temp>>fmt->Rshift;
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284 temp = temp<<fmt->Rloss;
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285 red = (Uint8)temp;
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286
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287 temp = pixel&fmt->Gmask;
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288 temp = temp>>fmt->Gshift;
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289 temp = temp<<fmt->Gloss;
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290 green = (Uint8)temp;
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291
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292 temp = pixel&fmt->Bmask;
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293 temp = temp>>fmt->Bshift;
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294 temp = temp<<fmt->Bloss;
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295 blue = (Uint8)temp;
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296 #endif
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297 blue = (Uint8) p[0];
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298 green = (Uint8) p[1];
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299 red = (Uint8) p[2];
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300
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301 //printf("tx = %d ty = %d ", tx,ty);
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302 //printf("pixel color => R: %d, G: %d, B: %d\n", red, green, blue);
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303
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304 SDL_PixelFormat *pf = NULL;
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305 //pf = viewer->screen->format;
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306
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307 //cout << SDL_MapRGB(pf, red, green, blue) << endl;
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308 return SDL_MapRGB(pf, red, green, blue);
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309 }
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